There are 16 girls and 18 boys in a class. The teacher chooses a student's name at random to answer a question.

2 answers:

7 0

I would A because if you do 16+18 that is 34 and the teacher would only be choosing one girl. So I think it is A. I’m sorry if this is wrong! Have a great day!

fomenos2 years ago

4 0

Answer:

I would go with c

Step-by-step explanation:

if it is incorrect sorry

You might be interested in

From a cuboidal cardboard box of dimensions 80cm×40cm×15cm,6 circles of radius 7 cm were cut from the front face.Find the surfac

Irina-Kira [14]

Answer:

9076 cm²

Hope my answer helped you

6 0

2 years ago

Find the value of y. * (8x - 7) (3x - 11) (2y +23) (3z2-5) (4y + 8)

quester [9]

Answer:

66 6 I am not your friend 6

Step-by-step explanation:

7 0

2 years ago

Calculating cos-1 ( help is gladly appreciated :) )

Alekssandra [29.7K]

Answer:

$\frac{3\pi}{4}$

(Assuming you want your answer in radians)

If you want the answer in degrees just multiply your answer in radians by $\frac{180^\circ}{\pi}$ giving you:

$\frac{3\pi}{4} \cdot \frac{180^\circ}{\pi}=\frac{3(180)}{4}=135^{\circ}$ .

We can do this since $\pi \text{ rad }=180^\circ$ (half the circumference of the unit circle is equivalent to 180 degree rotation).

Step-by-step explanation:

$\cos^{-1}(x)$ is going to output an angle measurement in $[0,\pi]$ .

So we are looking to solve the following equation in that interval:

$\cos(x)=-\frac{\sqrt{2}}{2}$ .

This happens in the second quadrant on the given interval.

The solution to the equation is $\frac{3\pi}{4}$ .

So we are saying that $\cos(\frac{3\pi}{4})=\frac{-\sqrt{2}}{2}$ implies $\cos^{-1}(\frac{-\sqrt{2}}{2})=\frac{3\pi}{4}$ since $\frac{3\pi}{4} \in [0,\pi]$ .